Concentration adjusting type inhalation anesthesia device for anesthesiology department

Abstract

The invention discloses a concentration adjusting type inhalation anesthesia device for the anesthesiology department, and relates to the technical field of medical instruments. The device comprises a gas supply module, a mixing module, a concentration adjusting module, a monitoring module and a control system. The device dynamically adjusts the concentration of anesthetic gas through a closed-loop control algorithm, performs real-time monitoring through an infrared spectrum sensor, and optimizes an adjustment strategy in combination with fuzzy logic. Preferably, the electric control evaporator adopts a double-channel design and supports independent adjustment of various anesthetics. According to the invention, the response speed and precision of anesthetic gas concentration adjustment can be remarkably improved, the safety of the anesthesia process is enhanced, diversified operation requirements are met, and reliable technical support is provided for clinical anesthesia.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to an anesthesia concentration adjustment type inhalation anesthesia device. BACKGROUND

[0002] Traditional inhalation anesthesia devices usually adjust the output concentration of the evaporation tank manually or rely on preset parameters to control the anesthesia gas concentration. This mode has certain limitations in actual application. For example, the concentration adjustment has obvious hysteresis, and manual adjustment needs to rely on the experience of the operator, and the response speed is slow when the real-time demand of the patient changes. In addition, the traditional evaporation tank is greatly affected by temperature and pressure, resulting in obvious fluctuation of the output concentration, which is difficult to keep stable all the time. At the same time, the existing device lacks a feedback closed-loop mechanism, and does not integrate real-time concentration monitoring and automatic adjustment functions, which is easy to cause anesthesia too deep or too shallow. These limitations show that an intelligent anesthesia device capable of dynamically adjusting the anesthesia gas concentration and realizing closed-loop control is urgently needed to meet higher clinical needs.

[0003] Therefore, the present application is proposed.

[0004] The present application solves the technical problem of overcoming the shortcomings of the prior art and providing an anesthesia concentration adjustment type inhalation anesthesia device.

[0005] To solve the above technical problems, the basic idea of the technical solution of the present application is as follows: An anesthesia concentration adjustment type inhalation anesthesia device, comprising a gas supply module, a mixing module, a concentration adjustment module, a monitoring module and a control system. The gas supply module is used to deliver oxygen and / or air to the system and adjust the rate of gas flow through a flow controller; the mixing module mixes the anesthesia gas and the carrier gas at a set ratio and then outputs them to the patient's breathing circuit; the concentration adjustment module is internally provided with a gas concentration sensor and a closed-loop control algorithm, which can detect and dynamically adjust the anesthesia gas concentration in the mixed gas in real time; the monitoring module collects and displays the operating parameters of the system in real time; the control system generates new adjustment instructions according to the monitoring data to complete the closed-loop control.

[0006] Specifically, the gas supply module contains a mass flow meter for accurately controlling the flow of oxygen and air. The module is connected to the mixing module through a pipeline, and the connection mode adopts a threaded sealing interface to ensure that there is no leakage during gas transmission. The mixing module is internally provided with a vortex mixing chamber, which can fully mix the anesthesia gas and the carrier gas to avoid concentration fluctuation caused by uneven mixing. A pressure sensor is installed at the outlet end of the mixing module to monitor the pressure value of the output gas and ensure that it is within a safe range.

[0007] The core component of the concentration adjustment module is an electrically controlled evaporator, which has multiple heating layers inside. The temperature compensation mechanism is used to eliminate the influence of external environmental temperature on the evaporation of anesthetics. The valve opening of the electrically controlled evaporator is driven by a stepper motor, which receives instructions from the control system and adjusts the valve opening to change the output of anesthetic gas. The gas concentration sensor uses infrared spectroscopy detection technology and is installed at the outlet of the mixing module to measure the concentration of anesthetic gas in the mixed gas in real time. The sensor signal is transmitted to the control system through a wire, and the transmission cable uses a shielding design to reduce the influence of electromagnetic interference on signal acquisition.

[0008] The monitoring module includes multiple sensor units for collecting gas concentration, flow rate, and pressure parameters. These sensor units communicate with the control system through a bus protocol to ensure real-time and accurate data transmission. The monitoring module is also equipped with an audible and visual alarm device that is triggered when a parameter exceeds the preset threshold, prompting the operator to take appropriate measures. The alarm device consists of an LED light and a buzzer and is installed in a prominent position on the device housing for easy observation.

[0009] The human-machine interface is located on the front panel of the device and uses a touch screen design to support anesthesiologists in setting target concentrations, adjusting parameters, and viewing real-time data curves. The touch screen is connected to the control system through a serial communication port, and the communication protocol supports multi-point touch control. The data displayed on the interface includes the current anesthetic gas concentration, oxygen flow rate, mixed gas pressure, and alarm status, and all data displays are filtered to reduce noise interference.

[0010] The closed-loop control algorithm integrates a fuzzy logic controller to optimize the adjustment strategy based on patient physiological data. The input variables of the fuzzy logic controller include the deviation value and its rate of change between the target concentration and the measured concentration, and the output variable is the adjustment amount of the electrically controlled evaporator valve opening. The design of the fuzzy rule base is based on clinical experience and covers the anesthesia needs of various surgical scenarios. In addition, the device can be equipped with a wireless communication module to connect to the hospital information system (HIS) through Wi-Fi or Bluetooth, enabling data synchronization and remote monitoring.

[0011] The electrically controlled evaporator uses a dual-channel design to support the simultaneous output of two anesthetics and independent adjustment of their concentrations. Each channel is equipped with an independent heating plate and valve, separated by a partition to prevent interference between the two anesthetics. The dual-channel design is suitable for complex surgical scenarios and meets the clinical needs of combined use of different anesthetics.

[0012] Compared with the prior art, the present application has the following advantages: first, the concentration of anesthetic gas is dynamically adjusted by a closed-loop control algorithm, significantly improving the response speed and accuracy of concentration adjustment. Second, the real-time monitoring and alarm function enhances the safety of the anesthesia process, effectively avoiding the risk of too deep or too shallow anesthesia. Third, the design of the dual-channel electric vaporizer improves the compatibility of the device, meeting the diverse needs of surgery. Finally, the introduction of the human-computer interaction interface and wireless communication module improves the operation convenience and data management efficiency.

[0013] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] The following description of the drawings is merely some embodiments, and other drawings can be obtained from these drawings without creative labor for those skilled in the art. In the drawings: Figure 1 The flowchart of the anesthesia concentration adjustment type inhalation anesthesia device of the present application is shown in the figure; In the drawings, the component list represented by each number is as follows: DETAILED DESCRIPTION

[0015] The present application will now be further described in detail with reference to the accompanying drawings.

[0016] Please refer to Figure 1 The anesthesia concentration adjustment type inhalation anesthesia device provided in the embodiment is shown in the figure, which comprises a gas supply module, a mixing module, a concentration adjustment module, a monitoring module, a control system, a mass flowmeter, a vortex mixing chamber, an electric vaporizer, a gas concentration sensor and a human-computer interaction interface. The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings The gas supply module is connected to the mixing module through a pipeline, and the connection mode adopts a threaded sealing interface to ensure that there is no leakage during gas transmission. The gas supply module is internally provided with a mass flowmeter for accurately controlling the flow of oxygen and air. The mass flowmeter is connected to the control system through a signal line to transmit real-time flow data to the control system. The output end of the gas supply module is provided with a pressure regulating valve for adjusting the pressure value of the output gas as needed. The outlet of the gas supply module is directly connected to the inlet of the mixing module through a hard pipeline. The mixing module is internally designed with a vortex mixing chamber, which is a cylindrical cavity with a spiral flow guide groove on its inner wall to form a vortex after the gas enters the cavity, thereby realizing the full mixing of the anesthetic gas and the carrier gas. A pressure sensor is installed at the outlet end of the vortex mixing chamber, which is connected to the monitoring module through a signal line. The monitoring module transmits the pressure data to the control system. The outlet of the mixing module is connected to the inlet of the concentration adjustment module through a pipeline.

[0017] The core component of the concentration adjustment module is an electrically controlled evaporator, which is internally provided with multiple layers of heating fins for eliminating the influence of external environmental temperature on the evaporation of anesthetic through a temperature compensation mechanism. The heating fins are driven by the control system through PWM signals to achieve precise temperature control. The valve opening degree of the electrically controlled evaporator is driven by a stepper motor, which receives instructions from the control system to adjust the valve opening degree to change the output of anesthetic gas. The outlet of the electrically controlled evaporator is connected to the inlet of the mixing module through a pipeline, forming a closed-loop feedback system. A gas concentration sensor is installed at the outlet of the mixing module for real-time measurement of the concentration of anesthetic gas in the mixed gas. The gas concentration sensor uses infrared spectroscopy detection technology, and its signal is transmitted to the control system through shielded wires to reduce the influence of electromagnetic interference on signal acquisition. The probe part of the gas concentration sensor is inserted into the outlet pipeline of the mixing module and fixed by threads to ensure the sealing.

[0018] The monitoring module includes multiple sensor units for collecting gas concentration, flow rate, and pressure parameters. These sensor units communicate with the control system through a bus protocol to ensure real-time and accurate data transmission. The monitoring module is also equipped with an audible and visual alarm device composed of an LED light and a buzzer, which is installed in a conspicuous position on the device housing for easy observation. The LED light and buzzer are connected to the control system through signal lines, and when a parameter exceeds the preset threshold, the control system triggers the alarm device to issue a warning signal. The sensor units of the monitoring module are fixed inside the device through special brackets made of corrosion-resistant materials to adapt to long-term use in harsh environments.

[0019] The human-machine interaction interface is located on the front panel of the device and is designed with a touch screen, which supports anesthetists to set target concentrations, adjust parameters, and view real-time data curves. The touch screen is connected to the control system through serial communication, and the communication protocol supports multi-point touch control. The display content of the human-machine interaction interface includes the current anesthetic gas concentration, oxygen flow rate, mixed gas pressure, and alarm status, and all data displays are filtered to reduce noise interference. The back of the human-machine interaction interface is fixed to the device housing through bolts, and the connection cable between it and the control system is arranged through a wire slot to avoid the exposure of the cable affecting the aesthetics and safety.

[0020] The control system integrates a fuzzy logic controller, the input variables of the fuzzy logic controller include the deviation value and the change rate of the target concentration and the measured concentration, and the output variable is the adjustment amount of the opening degree of the electrically controlled evaporator valve. The design of the fuzzy rule base is based on clinical experience and covers the anesthesia requirements in various surgical scenarios. The control system is connected with the mass flow meter, the electrically controlled evaporator, the gas concentration sensor, the monitoring module and the human-computer interaction interface through signal lines to realize the functions of data acquisition, instruction sending and feedback control. The hardware part of the control system includes a microprocessor, a memory and peripheral circuits. The microprocessor adopts a high-performance ARM architecture chip, the memory is used for storing running programs and historical data, and the peripheral circuits include a power management circuit, a signal conditioning circuit and a communication interface circuit.

[0021] Further, the design of the double-channel electrically controlled evaporator is described. The double-channel electrically controlled evaporator supports simultaneous output of two anesthetics and independent adjustment of the concentrations. Each channel is equipped with an independent heating sheet and valve and is separated by a partition plate to avoid interference between the two anesthetics. The double-channel design is suitable for complex surgical scenarios and meets the clinical requirements of combined use of different anesthetics. The two channels of the electrically controlled evaporator are connected to the inlet of the mixing module through independent pipelines, and a one-way valve is installed on each pipeline to prevent gas backflow from affecting the normal operation of the other channel.

[0022] In the specific implementation process, taking sevoflurane anesthesia as an example: the doctor sets the target concentration to 2% through the human-computer interaction interface; the gas supply module delivers oxygen according to the set flow rate, and the electrically controlled evaporator outputs sevoflurane gas; the infrared spectrum sensor monitors the mixed gas concentration in real time and transmits the data to the control system; the fuzzy logic controller calculates the valve opening adjustment amount according to the deviation value of the target concentration and the measured concentration, and the stepper motor executes the adjustment action; if the measured concentration deviation exceeds ±0.2% and lasts for 5 seconds, the audible and visual alarm device is triggered, and the event log records the abnormal situation. The whole process dynamically adjusts the anesthesia gas concentration through a closed-loop control algorithm to ensure the safety and stability of the anesthesia process.

[0023] Through the cooperation of the above-mentioned modules and components, the present application realizes precise adjustment and real-time monitoring of the anesthesia gas concentration. Among them, the gas supply module provides stable oxygen and air flow; the mixing module ensures sufficient gas mixing; the concentration adjustment module dynamically adjusts the anesthesia gas concentration through a closed-loop control algorithm; the monitoring module collects running parameters in real time and provides an alarm function; the control system serves as the core processing unit and coordinates the work of each module; and the human-computer interaction interface provides an intuitive operation and monitoring means for the operator. Through the combination of hardware design and software algorithm, the problems of hysteresis, insufficient precision and lack of feedback loop in traditional inhalation anesthesia devices are solved.

[0024] In order to better enable the relevant personnel in the technical field to fully understand and implement the present application, the specific implementation principles of the present application are further supplemented below in combination with a specific application scenario.

[0025] Firstly, the doctor sets the target anesthetic gas concentration to 2% through the human-computer interaction interface, and inputs the oxygen flow parameter. After receiving the instruction issued by the control system, the internal mass flow meter of the gas supply module accurately adjusts the flow of oxygen and air according to the preset value, and delivers the gas to the mixing module through the threaded sealing interface. At this time, the pressure regulating valve ensures that the pressure value of the output gas is within the safe range, avoiding the influence of excessively high or low pressure on the subsequent process.

[0026] Subsequently, the vortex mixing chamber in the mixing module begins to play a role. After the oxygen and anesthetic gas enter the vortex mixing chamber, they form vortex motion along the spiral-shaped guide groove on the inner wall. This design can significantly improve the uniformity of gas mixing, thereby avoiding the problem of concentration fluctuation caused by uneven mixing. The mixed gas flows out from the outlet end of the vortex mixing chamber, and the pressure sensor collects the pressure data of the gas in real time and transmits the data to the monitoring module through the signal line. The monitoring module then transmits the data to the control system to ensure that the pressure of the mixed gas is always within the safe range.

[0027] Next, the concentration adjustment module starts the dynamic adjustment process. The electrically controlled evaporator, as the core component, has multiple layers of heating sheets inside it that are driven by PWM signals to precisely compensate for the influence of external environmental temperature on the evaporation of anesthetics, thereby maintaining a stable output of anesthetic gas. The stepper motor receives instructions from the control system to adjust the opening degree of the electrically controlled evaporator valve to change the output ratio of anesthetic gas. When the mixed gas passes through the gas concentration sensor, the infrared spectrum detection technology measures the anesthetic gas concentration in the mixed gas in real time and transmits the data to the control system through the shielded wire. The fuzzy logic controller in the control system calculates the adjustment amount of the valve opening degree according to the deviation value and its change rate between the target concentration and the measured concentration, and executes the corresponding action through the stepper motor.

[0028] If the deviation between the measured concentration and the target concentration exceeds ±0.2% and lasts for more than 5 seconds, the control system triggers the sound-light alarm device. At this time, the LED light flashes and is accompanied by a prompt sound from the buzzer, reminding the operator to pay attention to the abnormal situation. At the same time, the event log records relevant data for subsequent analysis and improvement. This closed-loop feedback mechanism ensures that the anesthetic gas concentration is always maintained within the target range.

[0029] In the design of a dual-channel electronically controlled vaporizer, two independent channels deliver different anesthetics. For example, in complex surgical scenarios, a doctor may need to use sevoflurane and isoflurane simultaneously. Each channel is equipped with an independent heating element and valve, and is separated by a partition to prevent interference between the two anesthetics. The gases from the two channels enter the mixing module through separate pipes, and one-way valves prevent backflow to ensure proper operation of each channel.

[0030] Finally, the human-machine interface displays the current anesthetic gas concentration, oxygen flow, mixed gas pressure, and alarm status. All data displays are filtered to reduce noise interference and ensure data accuracy and readability. Doctors can view real-time data curves through the touch screen and adjust parameters according to the patient's actual needs.

[0031] In summary, the present application realizes precise adjustment and real-time monitoring of anesthetic gas concentration through the above steps and principles. The gas supply module provides stable oxygen and air flow, the mixing module ensures adequate gas mixing, the concentration adjustment module dynamically adjusts the anesthetic gas concentration through a closed-loop control algorithm, the monitoring module collects real-time operating parameters and provides an alarm function, the control system coordinates the work of each module, and the human-machine interface provides an intuitive operation and monitoring means for the operator. Through the combination of hardware design and software algorithms, the present application effectively solves the problems of hysteresis, insufficient precision, and lack of feedback and closed loop in traditional inhalation anesthesia devices, providing reliable technical support for clinical anesthesia.

[0032] The present application is not limited to the above embodiments, and any person should know that structural changes made under the inspiration of the present application fall within the scope of the present application. Any technical, shape, or structure not described in detail in the present application is a known technology.

Claims

1. A concentration-adjustable inhalation anesthesia device for anesthesiology departments, characterized in that, include: The gas supply module, mixing module, concentration adjustment module, monitoring module, and control system are characterized by: The gas supply module delivers oxygen and air to the system and adjusts the airflow rate using a mass flow meter; the mixing module mixes the anesthetic gas and carrier gas in a set ratio through a vortex mixing chamber and then outputs the mixture to the patient's breathing circuit. The concentration adjustment module has a built-in electronically controlled evaporator and a gas concentration sensor. The electronically controlled evaporator uses a stepper motor to drive the valve opening to adjust the output of anesthetic gas. The gas concentration sensor uses infrared spectroscopy detection technology to measure the concentration of anesthetic gas in the mixed gas in real time. The monitoring module collects gas concentration, flow rate, and pressure parameters and communicates with the control system via a bus protocol; the control system generates adjustment commands based on the monitoring data to complete closed-loop control.

2. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The gas supply module is connected to the mixing module via a threaded sealing interface. The gas supply module is equipped with a mass flow meter for precise control of the oxygen and air flow rates.

3. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The mixing module has a vortex mixing chamber inside. The vortex mixing chamber is a cylindrical cavity with spiral guide grooves on the inner wall, which is used to form vortices in the gas inside the cavity to achieve full mixing.

4. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The concentration adjustment module has multiple layers of heating elements inside the electronically controlled evaporator. The heating elements are driven by the control system through PWM signals to achieve temperature compensation.

5. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The gas concentration sensor is installed at the outlet of the mixing module. Its probe is inserted into the outlet pipe of the mixing module and fixed by threads to ensure a tight seal. The sensor signal is transmitted to the control system through a shielded wire.

6. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The monitoring module is equipped with an audible and visual alarm device, which consists of an LED light and a buzzer. When a certain parameter exceeds a preset threshold, an alarm is triggered.

7. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The human-machine interface is located on the front panel of the device. It adopts a touch screen design and is connected to the control system (5) via serial communication. It supports multi-touch function and displays the current anesthetic gas concentration, oxygen flow rate, mixed gas pressure and alarm status.

8. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The control system integrates a fuzzy logic controller. The input variables of the fuzzy logic controller are the deviation between the target concentration and the measured concentration and their rate of change, and the output variable is the adjustment amount of the valve opening of the electronically controlled evaporator.

9. A concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The electronically controlled evaporator adopts a dual-channel design. Each channel is equipped with an independent heating element and valve and is separated by an isolation plate. The two channels are connected to the inlet of the mixing module through independent pipes, and each pipe is equipped with a one-way valve.

10. The concentration-adjustable inhalation anesthesia device for anesthesiology departments according to claim 1, characterized in that, The device can be equipped with a wireless communication module, which connects to the hospital information system via Wi-Fi or Bluetooth to achieve data synchronization and remote monitoring.

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